red hat rhcsa

The Red Hat certification system is rhct rhce rhca, and the security expert rhcss rhce is a separate certificate for installation and deployment of Linux local use, Exclude local network clients and local systems. It's about the scope of the exam. The exam is 3600 plus the training fee of 3200. A total of 6800. If you have the ability You can skip the training institution You can access RedHat

The newly installed Red Hat Linux, Telent can be used, and SSH can also be used, but xmanager cannot log on. Therefore, I found that the following blog post is still very detailed, follow your own operations Http://blog.csdn.net/snlying/article/details/6446934 The details are as follows: 1. edit/etc/X11/xdm/xaccess Change the line # * # Any host can get a login window first # Remove, that is * # Any host

Red Hat Enterprise Linux 5-a network interface bound in link aggregation mode cannot use the given DHCP address Define a network interfaceBond0For example, and useIfcfg-bond0The configuration file is as follows: Device = bond0Bootproto = DHCPType = BondingOnboot = YesUserctl = NoBonding_opts = "miimon = 100 mode = 4 lacp_rate = 1 xmit_hash_policy = 1" Two Ethernet devices have been configured to belong to t

Http://blog.itpub.net/post/8/124 By fenng. How to Use apt to Maintain Red Hat Enterprise Linux (RHEL) is a little surprising for pirated users and friends who use RHEL for testing.The dependency between software packages is a headache for administrators in Linux system maintenance. It is often because you want to install software A. However, when compiling, it tells you that software B is required before s

The reason is that your Linux is not registered on the Red Hat Network, so you cannot download the software package above. You can use centos as an alternative.The following describes how to use centos. 1. Uninstall the default Yum package installed by RHELView Yum packageRpm-Qa | grep yumDetachRpm-Qa | grep Yum | xargs rpm-e-nodeps 2. download the new Yum packageWget http://centos.ustc.edu.cn/centos/5/ O

Environment:OS: Red Hat Linux As 5DB: Oracle 10.2.0.4 Today, a developer deleted all the data in a table, because it was not a long time before the undo space was overwritten, And the undo space was restored. the recovery process is simulated as follows.SQL> connect hxl/hxlConnected. SQL> alter session set nls_language = american;Session altered.SQL> create table tb_rollback_test23 select rownum rn from dua

Install jenkins and hatjenkins in linux (red hat) Jenkins installation can be divided into online installation and local software installation. Here I use the second method. After downloading it, an application can be directly installed by clicking install, after installation, configure the jdk path! The following describes in detail:I. Prerequisites 1. Install jdk before installing jenkins. jdk 1.8 is inst

Q: Red Hat 5 Enterprise Edition-DHCP fault [experimental environment]-Linux general technology-Linux technology and application information. Read the following for details. In the lab environment: 1. The first linux host [DHCP server], IP Address: 10.0.0.2 Gateway: 10.0.0.1. The dhcp address pool is configured as follows: 2, the second linux host [dhcp relay], two NICs: eth0-10.0.0.1 gateway 10.0.0.1 et

Red Hat's official release of kernel security and Bug The fix update instructions are as follows:Https://rhn.redhat.com/errata/RHSA-2016-1277.htmlhttps://access.redhat.com/errata/RHSA-2016:1277The following is a brief introduction:Fix two important security vulnerabilities:cve-2015-8767cve-2016-4565fixed a number of Bug : fix system crash problems that may result from uninstalling or removing SCSI devices from the system . the boot phase loading USB

Desktop]# Prevent root administrator from logging in First use the Vim text editor to open the main configuration file of the SSHD service, then remove the pound sign (#) before the 48th line #permitrootlogin Yes parameter, and change the parameter value Yes to No, so it is no longer Allows the root administrator to log on remotely. [root@localhost Desktop]# vim /etc/ssh/sshd_config ..................Omit some output information..................47 #LoginGraceTime 2m 48 PermitRo

This article is based on Goland's official documentation and my own practice, a basic guide to the configuration of the Go Language environment on Linux systems, using the Linux version: Red Hat Enterprise linux Server release 7.5 (Maipo )First, we should go to the download website: www.Jetbrains.com WebsiteWe select the languages option at the top to see the following pageAt this point the "GO" cursor is d

#！ /bin/bashRead-p "Make sure to insert the System CD and press ENTER to continue"Mkdir-p/mnt/centos6.5mount/dev/cdrom/mnt/centos6.5Cat >/etc/yum.repos.d/centos-debuginfo.repo [Cluster]Name=cluster DirectoryBaseurl=file:///mnt/centos6.5/clusterEnabled=1Gpgcheck=0[Clusterstorage]Name=clusterstorage DirectoryBaseurl=file:///mnt/centos6.5/clusterstorageEnabled=1Gpgcheck=0[Server]Name=server Directorybaseurl=file:///mnt/centos6.5/server/Enabled=1Gpgcheck=0[VT]NAME=VT DirectoryBaseurl=file:///mnt/cen

I forgot the root password of the system a few days ago. I don't know how to solve it. I found a solution on the Internet to share it with you.When the system selection interface appears, press "E" on the options of Red Hat Linux, and three options will appear, press the "e" key on the second item similar to "kernel/vmlinuz-2.4.20-8 Ro root = label =/" and add "single" before "Ro" or "root ", then press ent

efficient Web server software in Linux. It was developed by the Rambler site, where Igor Sysoev is the second most visited in Russia. It has been running on large Russian websites for many years, relatively stable. Nginx has stable performance, rich functions, simple O M, fast processing of static files, and consumes very little system resources. As a Web server: Compared with Apache, Nginx uses less resources and supports more concurrent connections, reflecting higher efficiency. As a Server

From: http://hi.baidu.com/cpf_519408891/item/7bf088f365753705ce9f32b6 After installation, the problem is that Chinese characters and Chinese characters cannot be displayed in full English. You can install the two Chinese Character packages on the CD.The file name is as follows. Note that different versions of the file may have different numbers, which indicates the version number. the following is the name of the Chinese package in Red

./configureMakeMake instalMount after installation compilation is complete650) this.width=650; "src=" Http://s2.51cto.com/wyfs02/M02/8A/07/wKioL1gkWKGSsOZwAAAay5cYTXE914.jpg "title=" 2016-11-10_19-22-34.jpg "alt=" Wkiol1gkwkgssozwaaaay5cytxe914.jpg "/>viewing mount status with Df-tAt the end of the use of umount unloading off sometimes there will be umount to cancel the situation. Then add an option,-L.650) this.width=650; "src=" Http://s2.51cto.com/wyfs02/M02/8A/0B/wKiom1gkWkCAkZEuAAAaUl76E4k59

(HELP, urgent) Red Hat Enterprise 5.6postfix external domain email rejected to the Company domain-Linux Enterprise Application-Linux server application information, the following is read details. The boss asked me to create an email server yesterday to implement basic functions. [Root @ spriteapp1 ~] # Postconf-n Alias_maps = hash:/etc/aliases Command_directory =/usr/sbin Config_directory =/etc/postfix D

Simple setup of Varnish in Red Hat Linux 7 Host environment rhel6 selinux and iptables disabledLab host 172.25.254.2 varnish172.25.254.3 apache172.25.254.4 apacheFirst obtain the two packagesVarnish-3.0.5-1.el6.x86_64.rpm varnish-libs-3.0.5-1.el6.x86_64.rpmInstallYum install varnish-*-y### Configure a backend serverVim/etc/varnish/default. vclBackend xp1 { . Host = "172.25.254.3 "; . Port = "80 "; } 3 is th

Red Hat/CentOSext4 cannot format large partitions The RedHat/CentOS 6.5 e2fsprogs version is earlier than 1.41.12, so you cannot create a file system larger than 16 TB. Download the latest e2fsprogs, compile and install itFtp://ftp.ntu.edu.tw/linux/kernel/people/tytso/e2fsprogs/ Tar zxvf e2fsprogs-1.42.10.tar.gzCd e2fsprogs-1.42.10Mkdir buildCd build/../ConfigureMakeMake install Mke2fs-O 64bit, has_journal,

I. installation environment Virtual Machine: VMware station 10 client: Red Hat 5.6 Ii. Start 1) first Click "Install Vmware tools ". Because I have already installed it, it is displayed as "reinstall. 2) Right-click the desktop and Open Terminal ). Enter the following command (note the space ): Mount-t iso9660/dev/cdrom/mnt (load the CDROM device and the CDROM is read-only) Cp/mnt/VMwareTools-9.6.